Crispy potato and cheese puff pastry

Crispy potato and cheese puff pastry is a delightful and versatile dish! It’s perfect as an appetizer, side dish, or even a light meal. Here’s a recipe to guide you:
Ingredients:
1 sheet (about 250g) puff pastry, thawed
2-3 medium potatoes (e.g., Yukon Gold or Russet), thinly sliced
1 cup shredded cheese (e.g., Gruyère, cheddar, mozzarella, or a blend)
1 small onion or shallot, thinly sliced (optional)
2 cloves garlic, minced (optional)
2 tablespoons olive oil
Salt and pepper to taste
Fresh herbs (e.g., thyme, rosemary, parsley) for garnish (optional)
1 egg, beaten (for egg wash)
Instructions: